Connect c++ unix server/socket to java windows client/socket

Initially I would like to thank you for your time...

I created a server socket in c++ in my macbook and a client/socket using Java in a diffrent machine which runs windows xp. I have specified the port to 5000 but I cant specify the correct Host and thus I can not make the connection. When I created a c++ server/socket in windows xp using WinSock2 the connection was made perfectly as I used the localhost...any ideas???

Thnx in advance

C++ code

int main( int argc, const char** argv ) {

/* SOCKET VARIABLES */
int sock;
struct sockaddr_in server;
int mysock;
char buff[1024];
int rval;


/*CREATE SOCKET*/
sock =socket(AF_INET, SOCK_STREAM, 0);
if (sock<0) 
{
    perror("*FAILED TO CREATE SOCKET*");
    exit(1);
}

server.sin_family=AF_INET;
server.sin_addr.s_addr=INADDR_ANY;
server.sin_port=5000;

/*CALL BIND*/
if (bind(sock, (struct sockaddr *)&server, sizeof(server)))
{
    perror("BIND FAILED");
    exit(1);
}


/*LISTEN*/
listen(sock, 5);


/*ACCEPT*/
do{

    mysock= accept(sock, (struct sockaddr *) 0, 0);

    if (mysock==-1) 
    {

        perror ("ACCEPT FAILED");
    }
    else
    {
        memset(buff, 0, sizeof(buff));

        if ((rval=recv(mysock, buff, sizeof(buff), 0)) <0) {
            perror("READING STREAM MESSAGE ERROR");
        }
        else if(rval==0)
            printf("Ending connection");
        else
            printf("MSG: %s\n", buff);

        printf("GOT THE MESSAGE (rval = %d)\n", rval);

    }

    return 0;
}while (1) ;

Java code

import java.io.; import java.net.;

public class SOK_1_CLIENT {

public void run() throws Exception
{
    Socket SOCK =new Socket ("localhost",5000);
    PrintStream PS =new PrintStream(SOCK.getOutputStream());
    PS.println("HELLO TO SERVER FROM CLIENT");

    InputStreamReader IR =new InputStreamReader(SOCK.getInputStream());
    BufferedReader BR = new BufferedReader(IR);

    String MESSAGE =BR.readLine();
    System.out.println(MESSAGE + "java");
}

}